From: Christoph Lameter <clameter@sgi.com>
To: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm <linux-mm@kvack.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm: inactive-clean list
Date: Tue, 25 Jul 2006 17:05:54 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0607251702560.464@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <44C6B111.9010502@redhat.com>
On Tue, 25 Jul 2006, Rik van Riel wrote:
> > Well, I read the whole thing before I replied and I could not figure this
> > one out. Maybe I am too dumb to understand. Could you please explain
> > yourself in more detail
>
> Page state transitions can be very expensive in a virtualized
> environment, so it would be good if we had fewer transitions.
So the hypervisor indeed tracks each individual page state? Note that I do
not propose to change the page state but a counter for page states. I am
bit confused about how not touching a page can cause page state
transitions. But then I do not know much about hypervisors. What magic is
going on in the background that could enable the hypervisor to track
counter increments?
--
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next prev parent reply other threads:[~2006-07-26 0:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-17 20:24 Peter Zijlstra
2006-07-18 3:37 ` Christoph Lameter
2006-07-18 12:16 ` Peter Zijlstra
2006-07-18 13:29 ` Christoph Lameter
2006-07-18 13:55 ` Martin J. Bligh
2006-07-18 13:59 ` Christoph Lameter
2006-07-18 15:12 ` Martin J. Bligh
2006-07-18 15:57 ` Christoph Lameter
2006-07-18 16:23 ` Martin J. Bligh
2006-07-18 14:03 ` Christoph Lameter
2006-07-18 14:25 ` Andrew Morton
2006-07-18 14:45 ` Christoph Lameter
2006-07-18 15:59 ` KAMEZAWA Hiroyuki
2006-07-23 5:50 ` Rik van Riel
2006-07-24 18:11 ` Christoph Lameter
2006-07-24 19:00 ` Rik van Riel
2006-07-25 20:25 ` Christoph Lameter
2006-07-25 21:37 ` Rik van Riel
2006-07-25 23:03 ` Christoph Lameter
2006-07-26 0:02 ` Rik van Riel
2006-07-26 0:05 ` Christoph Lameter [this message]
2006-07-26 11:00 ` Martin Schwidefsky
2006-07-26 11:11 ` Peter Zijlstra
2006-07-26 13:04 ` Martin Schwidefsky
2006-07-26 14:45 ` Peter Zijlstra
2006-07-27 11:16 ` Martin Schwidefsky
2006-07-26 15:41 ` Rik van Riel
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